Die



1950 A. DEICHMILLER ETAL 2,

DIE

Filed June 19, 1948 INVENTORS I A. DE/CHM/LLER EFSHALLA BY j A 7' TORNEYPatented Dec. 12, 1950 DIE Alwin lieichmiller and Edmund F. Shalla,Pasadena, Md, assigncrs to Western Electric Company, incorporated, NewYork, N. Y., a corporation of New York application June 19, 1948, SerialNo. 34,003

3 Claims. 1

This invention relates to dies, and more particularly to sectional diesfor material punching operations.

An object of the invention is the provision of new and improved dies.

A further object of the invention is to provide new and improvedsectional dies for material punching operations.

Another object of the invention is to provide new and improved sectionaldies which are held tightly together on platens.

A die illustrating certain features of the invention may include asectional die element having a portion tapering from one face thereof tothe opposite face thereof, and a clamp being provided with armscomplementary to said portion of the die element, whereby the sectionsof the die ele ment may be wedged together by the clamp.

A complete understanding of the invention may be obtained from thefollowing detailed description of a die forming a specific embodimentthereof, when read in conjunction with the appended drawing, in which:

Fig. 1 is a plan View or" a die forming one embodiment of the invention,and

Fig. 2 is a fragmentary, vertical section taken along line 22 of 1.

Referring now in detail to the drawing, a die H] is provided with a pairof die apertures l2 and it formed in sections it, ii and it, which areheld against longitudinal movement relative to one another by keys and22. Cap screws 2 t2 l threaded into tapped bores 26 25 formed in aplaten 23 secure the die it to the platen 28 after the sections it, itand it of the die iii are wedged tightly together by the action ofdovetailed clamps 3 33&, which are provided with wedge surfaces 32-32acting against wedge surfaces 3--3l formed on the sections it and it ofthe die Hi. That is, there is a compound taper on the clamps and the dieso that the clamps cannot work free of the die accidentally. The dieholds the clamps against the platen, and the dovetailing prevents theclamps from sliding off the ends of the die.

The die It} and the clamps fit-38, which are movable with the die iii asa unit, may be released from the platen it merely by unscrewing the capscrews 2 i-2l The die Hi may be disassembled from the clamps til-39merely by tapping the clamps 3.isli or the die sections It and IS indirections such as to lessen the wedging action between the clamps 3ii-3il and the die It. Hence, the die it may be easily disassembled formaintenance operations thereon that may be r needed.

The die sections it, i? and it are easily assembled in closerelationship merely by tapping the die sections into the clamps til-3t.The die and the clamps then are mounted on the platen,

and the die sections l6 and it are bolted to the platen 28. The clampslid-3t force the die sections I6 and I8 tightly against the die sectionll so that the sections IE, it and is lit tightly together and arealways spaced the same after each maintenance operation in which theyare removed from the clamps Ee -3s and replaced therein.

A clamp, such as the clamps (iii-38, may be used to repair a cracked diemerely by forming portions complementary to the compoundly tapered clampat the edge of the die and bracketing the crack in the die so that theclamp is locked to the die and presses together the portions of the dieon opposite sides of the crack.

What is claimed is:

1. A die, which comprises a platen, a sectional die having maledovetailed end portions bracketing the juncture between the elements ofthe sectional die, said die having a noncircular die openingintersecting the juncture of the elements thereof, a pair of clampshaving female dovetailed portions complementary to the dovetailedportions of the die for clamping together the sectional elements of thedie, and means for securing the die to the platen, the dovetailedportions of the clamps and the die being wedgeshaped in planessubstantially transverse to the plane of the die and in such directionsthat the die locks the clamps to the platen.

2. A die, which comprises a platen, a die element having a split thereinextending from one end to the other end, said die element having maledovetailed portions bracketing the ends of the split and also beingprovided with a noncircular die opening intersecting the split therein,a pair of clamps having female dovetailed portions complementary to themale dovetailed portions of the die element for clamping toge trier theportions of the die element on opposite sides of the split, a key forkeying the portions of the die element against movement relative to oneanother along the split, and means for securing one of the die elementand the pair of clamps to the platen, the dovetailed portions of the dieelement and the clamps being wedge-shaped in a plane substantiallytransverse to the plane of the die and the direction of wedging beingsuch that the one of the die element and the pair of clamps that issecured to the platen locks the other to the platen, the clamps and thedie element being so constructed and arranged that there is clearancebetween the ends of the arms of the clamps and the die element and theends of the die element abut the portions of the clamps between the armsthereof when the clamps are in locking positions on the die element.

3. A die, which comprises a platen, a die element having a split thereinextending from one end to the other end, said die element having maledovetailed portions bracketing the ends of the. split and also beingprovided with a noncircular,

.die element for clamping together the portions of the die element onopposite sides of the split, a key for keying the portions of the dieelement against movement relative to one another along the split, andmeans for securing the die element to the platen, the dovetailedportions of the die element and the clamps being wedge-shaped in a planesubstantially transverse to the plane of. the die and the direction ofwedging being such that the die element locks the clamps to the platen,the clamps and the die element being so constructed and arranged thatthere is clearance between the ends of the arms of the clamps and thedie element and the endsof the die element abut the portions of theclamps between the arms thereof when the clamps are in looking positionson the die element. 7

ALWIN DEICHMILLER. EDMUND F. SHALLA.

REFERENCES CITED The following references are of record in the file ofthis patent:

Number 00 Number 223,201

UNITED STATES PATENTS Name Date Coleman et a1 Oct. 24, 1893 Knudson Mar.1'7, 1903 Lewis Apr. 4, 1905 Schwartz Apr. 26, 1910 Noteboom Apr. 7,1925 Lahr June 19, 1945 FOREIGN PATENTS Country Date Great Britain Jan.15, 1895

